Search engines are been there, done that these days. To really compete, you need your own voice assistant that can do the searching for us, then regurgitate this information using a friendly voice. Business Insider reports that, in a conference call to report Yahoo's first quarter earnings on Tuesday, CEO Marissa Mayer mentioned her company's plans to take on personal assistants such as Google Now, Apple's Siri, and Microsoft's Cortana. The site claims that the project is currently code-named Index.